Here are practical, affordable options and how to find them — focused on Norwegian hotels and chains that combine lower prices with verifiable eco-credentials.

Top budget-friendly, eco-minded chains and certifications (good places to start)

• Scandic Hotels — many Scandic properties in Norway are affordable and the group has large-scale sustainability programs; a high percentage of Scandic Hotels in Norway hold the Nordic Swan Ecolabel. (scandichotels.com)
• Thon Hotels — a major Norwegian chain with many mid‑price hotels that holds Eco‑Lighthouse (Miljøfyrtårn) certification for its Norwegian properties and runs active energy/food‑waste programs. Thon positions itself as a sustainable, good-value option. (thonhotels.com)
• Certifications to look for on listings — Nordic Swan Ecolabel (Svanen) and Eco‑Lighthouse (Miljøfyrtårn) are widely used in Norway and indicate verified environmental practices. Choosing hotels with these marks helps ensure real sustainability measures. (scandichotelsgroup.com)

Example approaches and where to find affordable eco options by city

• Oslo: Look for Scandic and Thon properties (many central Scandic/Thon Hotels are competitively priced outside peak season). Filter hotel sites for “Svanen” or “Eco‑Lighthouse” or search the hotel’s sustainability page. (scandichotels.com)
• Bergen & Stavanger: Scandic and Thon both operate city hotels here; smaller independent hotels in these cities sometimes display Green Key / Nordic Swan credentials — check the hotel’s sustainability statement before booking. (scandichotels.com)
• Northern Norway (Tromsø, Lofoten area): Fewer large chains; look for locally run guesthouses and mid‑range hotels that advertise eco‑labels or energy/waste/food‑sourcing policies. If ecolabel info isn’t on the booking page, contact the hotel — many are proud to share certificates and measures.

Practical tips to find the most affordable eco option

• Filter bookings by chain and then check the hotel’s sustainability page — Scandic and Thon publish their environmental credentials. (scandichotels.com)
• Use “Svanen” / “Nordic Swan Ecolabel” and “Miljøfyrtårn” / “Eco‑Lighthouse” as search terms plus the city name to find certified properties. (scandichotelsgroup.com)
• Travel off‑peak (shoulder seasons) and book weekdays to lower nightly rates; many certified hotels keep their programs while offering lower prices outside high season.
• Consider economy chains’ basic rooms (no breakfast or refundable rates) or eco‑minded hostels/guesthouses if you’re flexible — they’re often the cheapest way to stay with a smaller environmental footprint.

If you’d like, I can:

• Find 6–10 specific affordable, eco‑labelled hotels (by city or travel dates) and show nightly price ranges and the certification each holds; or
• Narrow recommendations to a particular city/region (Oslo, Bergen, Tromsø, Lofoten).

Which would you prefer?